GPT-4.1
OpenAIReleased Apr 14, 2025
GPT-4.1 is a flagship large language model optimized for advanced instruction following, real-world software engineering, and long-context reasoning. It supports a 1 million token context window and outperforms GPT-4o and...
- Context window
- 1.0M tokens
- Input
- image, text, file
- Output
- text
- Tokenizer
- GPT
- Knowledge cutoff
- Jun 30, 2024
- Released
- Apr 14, 2025
Pricing
Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.
| Per 1M tokens | Provider | + 3% fee | You pay |
|---|---|---|---|
| Input | $2.00 | $0.060 | $2.06 |
| Output | $8.00 | $0.240 | $8.24 |
| Cache read | $0.500 | $0.015 | $0.515 |
Benchmarks
Design Arena
| Category | Elo | Win rate | Rank |
|---|---|---|---|
| 3Dmodels | 926 | 30.9% | #95 |
| Codemodels | 1075 | 50.9% | #84 |
| Data vizmodels | 1147 | 59.5% | #65 |
| Game devmodels | 1145 | 59.1% | #66 |
| UI componentsmodels | 1056 | 49.7% | #80 |
| Websitesmodels | 1081 | 52.3% | #86 |
Head-to-head preference voting. How we filter and rank
Supported parameters
- max_completion_tokens
- max_tokens
- response_format
- seed
- structured_outputs
- temperature
- tool_choice
- tools
- top_p
Call it
OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model openai/gpt-4.1.
curl https://api.openkey.ai/v1/chat/completions \
-H "Authorization: Bearer $OPENKEY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "openai/gpt-4.1",
"messages": [{"role": "user", "content": "Hello"}]
}'import os
from openai import OpenAI
client = OpenAI(
base_url="https://api.openkey.ai/v1",
api_key=os.environ["OPENKEY_API_KEY"],
)
completion = client.chat.completions.create(
model="openai/gpt-4.1",
messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.openkey.ai/v1",
apiKey: process.env.OPENKEY_API_KEY,
});
const completion = await client.chat.completions.create({
model: "openai/gpt-4.1",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);Questions
- How much does GPT-4.1 cost via API?
- Through OpenKey, GPT-4.1 costs $2.06 per 1M input tokens and $8.24 per 1M output tokens. That is the provider price ($2.00 / $8.00) plus a flat 3% fee — nothing else.
- What is GPT-4.1's context window?
- GPT-4.1 accepts up to 1.0M tokens of context.
- Is GPT-4.1 OpenAI-compatible?
- Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "openai/gpt-4.1" using any OpenAI SDK — only the base URL and API key change.
- What inputs does GPT-4.1 support?
- GPT-4.1 accepts image, text, file input and produces text output. Its knowledge cutoff is Jun 30, 2024.
More from OpenAI
All OpenAI models →GPT Chat Latest
GPT Chat Latest points to OpenAI's stable API alias `chat-latest` that always resolves to the latest Instant chat model used in ChatGPT. As OpenAI rolls out new Instant model updates...
ctx 400Kin $5.15out $30.90
OpenAI GPT Latest
This model always redirects to the latest model in the OpenAI GPT family.
ctx 1.1Min $5.15out $30.90
OpenAI GPT Mini Latest
This model always redirects to the latest model in the OpenAI GPT Mini family.
ctx 400Kin $0.772out $4.63
GPT-5.5
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...
ctx 1.1Min $5.15out $30.90